For a number of years navigation systems have been able not only to show the way to the driver’s destination, but also to respond to unforeseen events such as traffi c congestion, and suggest alternative routes. This is made possible by
providing traffic data over the radio on the Traffic Message Channel (TMC).
Having to cater for upcoming traffic information-based travel services such as inter-modal route guidance offered by the BMW Group, TMC no longer meets these new requirements, since the new functions available in the car require not only straightforward traffic data, but also a lot more information with relatively large data volume. And since TMC can be received only on FM radio with its limited bandwidth, it is impossible to receive large amounts of data efficiently and quickly.
The solution to this problem is TPEG (Transportation Protocol Expert Group). These four letters describe a new international standard for transmitting multimodal traffic and travel information no longer requiring voice communication.
The TPEG Automotive Profile (TAP) has therefore been developed as part of the Mobile Info Project for transferring such information to the vehicle. In this project involving various car makers and providers of traffic services seeking to make full use of traffic information, the BMW Group was the leader in particular in developing this extension of TPEG.
TAP also offers useful information such as the flow of traffic and traffic speed, weather conditions, parking options and the occupancy of car parks, connections to other means of transport, as well as filling stations and the price of fuel.
Interacting with the development of broadband transmission channels such as Mobile Radio, DAB (Digital Audio Broadcasting) or HD Radio in the USA, TPEG allows the customer to conveniently access a very large range of information with utmost convenience from almost everywhere.